I'm having an issue with my BB and I can't diagnose the problem.
When I backpedal at a decent speed (say 15 mph) there is a whir and a bit of a drag that occurs. Yes, yes...just stop backpedaling. I know, that is the easy fix. But, I'd like to actually solve the problem. The whir seems to occur mainly on the drive-side.
Here is the thing - I had this same whir and it was time for some upgrades, so replaced my BB, chain, and cassettes. Replaced them all with quality stuff - Shimano UN-54 BB, SRAM chain, SRAM cassettes.
Anyone have an ideas?
My chainrings are fine. My deraillers are fine. The only thing I can think of is my derailler pulleys.
Again, I know my bicycle isn't going to explode next ride, but I take pride in taking care of it since it treats me well. It is a ten year old road bike with Shimano 105 components. Chain and things are lubed as well.